Feedinand dubbul



(Model.)

P. DUBRUL.

Machinery Clutch.

No. 238,577. Patented March 8,1881.

Fig. 2,

-AUbi-WED STATES PATENT OFFICE.

vFERDINAND DUBRUL, OF CINCINNATI, OHIO, ASSIGNOR OF ONE-HALF TO'NAPOLEON DU BRUL, OF SAME PLACE.

MACHINERY-CLUTCH.

SPECIFICATION forming part of Letters Patent No. 238,577, dated March 8,1881.

Application filed January 14, 1881. (Model.)

'Tofall whom fit may concern Be it known that I,^FERDINAND`DUBRUL, ofCincinnati, Hamilton county, Ohio, have invented a new and usefulMachinery-Clutch,

` of which the following is a specilication.

In the accompanying drawings, Figures 1 and2 are vertical sections onthe lines a' a: and y y, respectively. Figs. 3 and 4 are, respectively,a side view and an end View ofthe 1o self-clutching sleeve. Fig. 5shows, by vertical section, the preferred form of my self-clu tchingsleeve. Fig. 6 shows the form of trigger employed in connectiontherewith.

For the purpose of illustration I have shown and here describe my clutchas an integral member of a die-press; but it is capable of usefulapplication to a great variety of machines in which optional connectionwith and disconnection from the driving-power may be de- -2o sired.

A may represent a suitable die-press frame;

B, the customary supporting-table on which the work is laid; C,guide-bearing for plunger or head D of any die, stamp, or punch, E; F

F', bearings for shaft G; H, au eccentric or crank on said shaft; I,yoke which embraces said eccentric, and which, being prolonged downward,is pivoted, J, to the top of the plunger D.

The shaft G projects beyond bearing F', and is perforated, g, forinsertion, when desired, of a hand spike or lever, whereby said shaftcan be rotated by the operator independently of the drivin g-power forsetting of the dies or 3 5 other purposes; or, instead of or in additionto the perforations g, said shaft may be squared at its extremity forapplication of a wrench. The other extremity of shaft G carries adriving-pulley, K, that revolves loosely upon the 4o said shaft.

L is a sleeve, which is coupled to the shaft by a key or feather, M,which may be secured to the sleeve and slide in a groove, g', in theshaft G, as in Fig. 5, or may be secured to the shaft and slide in agroove in the sleeve, as in Figs. 2, 3, and 4. 1n either arrangementrotation or non-rotation of the sleeve is accompanied by a similarcondition ot' the shaft G. The sleeve L is capable of slidinglongitudinally 5o along the shaft G, and when left at liberty is pressedby helical spring N in close contact with the hub O of the pulley K, andin this condition is compelled to participate in the rotation of saidpulley, either in consequence of featherlVI occupying a cavity, o, insaid hub, as in Fig. 5, or in consequence otl projections lon the sleeveoccupying corresponding depressions o in the face of the hub, as in Fig.

2, and in consequence of the sleeve L being feathered to the shaft G inihe manner stated 6o such rotation is communicated, through said shaftand its eccentric, to the plungerD; but notwithstanding these provisionsthe normal condition of the said shaft and of its described appendagesis one of rest, and one in which the partsv tend to resume a state ofinaction at every ascent ot' the plunger.

The means by which the operative parts are brought into prompt actionand return automatically to a condition of inactivity I will 7o nowspecifically describe.

The sleeve L has on that side of it nearest the pulley K a spiralrecess, S, which at one end of it merges into the liat disk or face S ofthe sleeve side nearest the drive-pulley. l

R is a rod or bar, which I call the triggen This rod, when uncontrolledby the operator, is, by a sprin g, P, elevated to the position shown inFig. l, and in such position its Lipper eX- treinity, r, is forced infront of the liat portion 8o S of the sleeve-face, and operates to holdsaid sleeve away from the pulley, so as to prevent the lattercommunicating any motion to the shaft Gr.

To enable the operator to at any moment de- 85 press the trigger R, andthus surrender the sleeve L to the action of the spring N, I couple tothe lower end of the trigger a treadle, Q, located conveniently to theoperators foot. Depression of said treadle by clutching the shaft 9o Gto the drive-pulley K brings the plunger D into active motion, whichcontinues so long as the treadle remains depressed 5 but should theoperator desire a cessation of the plunger action, he has only torelease the treadle, so as 9 5 to leave the spring P at liberty tore-elevate the trigger, which, engaging in the spiral recess of thesleeve L, operates to push back the sleeve to its unclutclied positionat the point in the shafts revolution at which the eccenloo tric and itsattached plunger have reached their highest position, and, the shaftthen coming to rest, the punch is automatically withdrawn and held alooffrom the table or die. Before, however, the powerful andcomparatively-rapid action ofthe drive-pulley is brought i rectify anymisplacement.

into requisition it is generally necessary to as certain whether thepunch is accurately centered or adjusted relatively to the die, and toenable the operator to satisfy himself thereof and to rectify anymisplacement of the die while the machine is in motion means areprovided for the manual lowering ofthe plunger. These means consist ofthe perforations g, or equivalent device, whereby, while the sleeve isheld in the unclutched position by the trigger R, the operator, by useof a lever inserted in the perforations, is enabled to deliberatelyrevolve the shaft G, so as to bring the punch into such close vicinityto the die that he can judge whether the latter is properly placed, andcan W'hen left at lib erty the trigger R operates to automaticallyunclutch the sleeve and to self-lock the same in its unclutchedposition, in consequence of the triggers penetration beyond the spiralrecess S, which recess, penetrating only a part of the radial projectionof the sleeve L beyond the shaft G, permits the trigger R to slide indeeper than said recess, and to hold the sleeve in the unclutched orinactive position. This position, if the plunger motion has been derivedfrom the driving-pulley, will always be that of extreme retraction ofthe plunger; but if the plunger has been subsequently shifted by hand,in the manner above explained, the position will be that at which theplunger has been left by the hand of the operator, and if left below itsextreme height it will clutch and 40 raise the punch to its extremeheight, ready to receive the work. Hence the operator has the machineunder complete control, and does not need to stop the d rive-wheelpreparatory to setting .the dies.

For some purposes, instead of positive projections and correspondingrecesses on the cluteh-faces of the sleeve and drive-wheel, engagementmay depend on friction of one against the other.

Instead of but one spiral recess, two or more may be used for more rapidaction, and such a clutch may be applied to the shaft having the.smallest gear in a back-gear press, thereby avoiding strani inproportion to the difference By reversing the action of thetrigger-sprin g I the device can be made to go automatically into actioninstead of to automatically go out of action on release of the trigger.

I am aware that it is old to slide a clutchsleeve on its shaft by meansof a lever whose forward end engages the cams on the said clutch-sleeve.Such a device,therefbre, I do not claim, broadly.

Having thus described my invention, the following is what I claim as newand desire to secure by Letters Patent:

l. rIhe combination of the clutch-sleeve L, formed with inclined recessS and annular flat face S', and the trigger It, having portion i'adapted to work in said recess and pass in front of the face, to holdthe said sleeve in retracted position until released, as set forth.

2. rllhe combination ofthe shaft Gr, the sliding sleeve L, provided withkey-feather M, locking it to the shaft, so as to turn therewith, and thepulley K, the said key-feather sliding with the sleeve, to form aclutch-pin to engage the sleeve and shaft with the pulley, as and forthe purpose set forth.

3. The combination of clutch-sleeve L, having gradually-deepenin ginclined recess S and flat face S', the loose drive-pulley K, andselflocking trigger It, under control ofthe operator.

4. The device g, for adjusting the shaft and plunger, in combinationwith the clutch-sleeve L, formed with inclined recess S and flat faceS', and adapted to be held in disconnection, as set forth.`

5. The treadle Q, in combination with the trigger It, having portion r,spring P, and clutch-sleeve L, having dat face S, the said triggeradapted to hold the said sleeve in retracted position until released bythe said treadle, as set forth.

In testimony of which invention I hereunto set my hand.

FERDINAND DUBRUL.

Attest:

Guo. H. KNIGHT, SAML. S. CARPENTER.

IOO

